I'm not completely sure if this idea has already been submitted, regardless, any critic is appreciated. This is my first skip so I don't expect it to do well anyway. As stated in the summary, the name is temporary until I think of a better one.

The number (#) thing isn't necessary unless the number in question is extremely precise, and if that number is messed up by the containment specialists then dire consequences will occur.

In this case, if the lead box is 1.1 or 0.9 meters in length there will be no catastrophe.

Class A or B Amnestics may be administered due to its long term psychological effects

When you say 'due to', I think it's caused directly by the scip. I would word this more like: "…may be administered in response to its long term psychological effects."

Or something.

SCP-2XXX-1 is an audio recording in the form of a cassette tape

Is the SCP the recording or the cassette tape? The way you word this implies that they're the same thing. The SCP can be made up of a combination of the two, but the thing in storage (the audio) and the thing doing the storage (the cassette tape) aren't the same entity.

In the next sentence you clear up that SCP-2XXX-1 is actually the tape, but I suggest you change that first part anyway.

SCP-2XXX-2 is susceptible to physical damage of most kinds save water

with apparent water damage to its inner workings

Had to do a double-take here. Did you mean to say that while the mechanism has water damage, more water doesn't worsen it?

SCP-2XXXX-2's play button appears stuck and inoperable

'Appears to be' is a term when something seems to be one thing, but other evidence suggests otherwise (like it being an illusion or a facade). In this case, the button is stuck. Button no push- simple as that. No disputing it, no reason to think otherwise.

has been found to be everlasting

This sounds unprofessional. You might wanna say '…blah blah source of power inexhaustible," or something along those lines.

The note detailed ███████’’s experience with SCP-2XXX-1 and how it had drove him to insanity, noting that similarities SCP-2XXX-1 shares with highly addictive drugs such as cocaine and ██████

Two things: Firstly, why did you blackbox that second drug? Unless it's extracted from one of the orifices of something the Foundation has in custody, there's no reason it has to be censored.

Secondly,

noting the similarities

might work better.

D-2███ is currently undergoing rehabilitation in the form of cognitive behavioral theory

Why is D-2███'s designation censored?

Also, why are they doing therapy? D-Class are only kept around if there's a very specific purpose to doing so. I see no scientific reason to keep a depressed rapist/murderer around past their execution date.

The idea is okay, but it goes nowhere. 'A cassette tape that makes people angry when they can't hear it and also someone went comatose after listening for too long' is how I would summarize this.

This general idea has been done in a few different ways (listen to sound, bad stuff happen), but that doesn't mean you should scrap it. The 'clones' each have something that sets them apart. You could add, say, a twist to this to give it some identity.

As you probably know, the writing guide says that lotsa first articles don't make it because of lack of experience. It also says "This is a challenge". Accept that your first few tries might not do great, but try not to internalize it. Stay determined.